Hydrocarbon-motor.



Patented Sept. 2, I902 w. .1. STILL. 'HYDBOCARBON MOTOR.

[Application filed Aug. 81. 1901.)

7 Sheets-Sheefi L (No Modl.)

MQ Q

k U. MM a 2 m w 3 0 .3 m x Inventor Witnesses No. 708,502. Patented Sept. 2, I902.

W. J. STILL.

HYDROCARBON MOTOR.

(App 1ica.tion filed Aug, 31, 1901.)

Wi/im/ e/s sas ITM/eH/IIYQfi THE Nuams mans co. PHOTDJJTKO" WASNINUYO, n c,

Patented Sept. '2, I902.

w'. 4. STILL. HYDROCARBON MOTOR.

' (Application filed Aug. 31, 1901.)

7 sheatssheatt 3.

' (No mm.)

Inventor Wvf/rpesses.

THE aonms PETERS cu, PuoToumo. wasmnn'rau, n. c.

No. 708,502. Patented Sept. 2, I902.

W. J. STILL.

HYDQBDCABBON MOTOR.

{Application filed Aug. 31, 1901.) (No Model.) 7 Sheets-Sheet 5.

No. 708,502. Patented Sept. 2, I902.

W. J. STILL.

HYDROGA'RBON mo'ron.

' (Application filed Aug. 31, 1901.) (No Model.)

7 Sheets-8heet 6.

Wi/bme/sses. fnveniior THE NoRR s PETERS 0a.. PHO70-L|THO-. wAsmNcToM o. c.

No. 708,502. Patented Sept. 2; I902.

v W. J. ST|LL.

HYDROCARBON MOTOR.

I Application filed Aug. 31. 1901.) (No Model.) 7 SheetsSheeQ 1.

Witnesses. Int/071130.72

w gw fiw v 4i duff??? WILLIAM JOSEPH STILL, OF WIMBLEDON, ENGLAND.

HYDROCARBON-MOTORD.

:SBECIFICATION formingpart of Letters Patent No. 708,502, dated September 2, 1902.

application filed August 31, 1901. erial No. 73,933. (No model.)

To all whom it may concern.-

Be it known that LWILLIAM JOSEPH STILL, a subject of the King of Great Britain and Ireland,residing at Wimbledon,in the county of Surrey, England, have invented Im prove-- ments in Hydrocarbon-Motors, of which the following is a specification.

This invention has reference to improvements in hydrocarbon-motors of the type wherein the motor-cylin ders are arranged tangentiallyto the center of motion upon a wheel or carrier that is mounted to turn in a stationary bearing or bearings and is rotated about its axis by the combustion of explosive charges of hydrocarbon gas or vapor and air within the cylinders, the pistons of which are connected to or act upon a fixed body, around the axis of which the said wheel or carrier rotates.

The present invention has reference to improvements in motors of the type referred to whereby a more complete combustion of the explosive charges in the motor-cylinders and i a better utilization of the force of the expanding gases can be obtained than has heretofore been usual and wherebylalso the motor can be worked in an economical and advantageous manner. According thereto the tangentially arranged motor cylinders, of which there will usually be two, are placed parallel to one another and fixed to a wheel or carrier mounted to rotate about a central ton are made in a rapid manner and in less time than the instrokes, so that sufficient time is allowed before the commencement of each outstroke to admit of practically complete combustion of each explosive charge admitted to the com bustion-chamber of each cylindcigundue loss of heat by radiation from i the expanding hot gases is prevented on each working outstroke and a greater proportion than usual of the power of such gases thereby utilized, and sufficient time is allowed at or near the end of each working outstroke for the spent gases to escape and fall to atmospheric pressure-before the piston commences to make its return stroke, thus preventing back pressure on the piston. To facilitate complete combustion of the explosive charges and the attainment of a high temperature of combustion, each combustion-chamber is lined with material that isa bad conductor of heat, and the inner side of the piston is provided with similar material. Normally the central crank-shaft or body is fixed and the wheel or carrier with motor-cylinders rotates around it; but when it is desired to reduce the speed of the shaft, body, or vehicle driven by the motor the central shaft or body is released, so that the wheel or carrier with the attached parts and the central shaft or body can rot-ate idly together as one piece under the action. of the momentum of the wheel or carrier and attached parts, the regulation of speed being thus effected by throwing the motor out of action for a suitable time and not by variation in the supply or quality of the explosive charges. By this means each working stroke can be effected with an explosive mixture of constant com position and such as will enable practically complete combustion of such mixture to be at all times obtained. The.

fixing and releasing of the central crank-shaft or body are effected by a clutch that may be operated at the required timesby an automatic governor or by hand. The closed end of each cylinder is provided with alarge combustion-chamber having separate inlet and exhaust valves controlled by a lever operated by epicyclic gearing worked by the rotation of the motorand comprising a central toothed wheel fixed tothe central shaft or body. The ignition of the explosive charges admitted to each cylinder is or may be effected by an electrical igniter brought into act-ion at the required times by suitable means operated by the said epicyclic gearing.

The invention consistsin novel features of constructions and in certain combinations and arrangements of parts, all as hereinafter described and afterward pointed out in the claims.

In the accompanying drawings, Figure 1 is an end elevation, and Fig. 2a plan, showing one construction of motor according to this invention suitable for driving a bicycle or other road-vehicle. Fig. 3 is a horizontalsection on the line A A of Fig. 1, and Fig. 4 is a part vertical section on thelineB B of Fig. 3. Fig. 5 is a side elevation of part of the cylinder-casting with two crank-arms. Fig. 6 is a detail view of the clutch. Fig. 7 shows partly in longitudinal section and partly in side elevation,and Fig. 8 in end elevation, a modified arrangement of motor.

In the arrangement shown in Figs. 1 to 6, inclusive, a a are two parallel and tangentially-arranged motor-cylinders cast in one piece with or otherwise fixed to a lateral and central tubular extension I), that forms a rotary carrier for the cylinders and is mounted to rotate in suitable bearings a, such as ballbearings, in a support cl, carried by or forming part of the frame or body of the vehicle or other device to which the motor is applied. The tubular extension I) and attached cylinders a are formed with channels 6, that are in communication at one end through suitable ports or passagesfin the Wall of the tubular extension I) and support 01 with a passage g, through which a combustible mixture of hydrocarbon gas or vapor and air is supplied, and at the other end with inletports h, formed in the closed end wall it of each of two combustion-chambers m, each of the inlet-ports It being controlled by an inlet valve 11. The closed end wall loof each of the combustion-chambers m is also formed with an exhaust-port 0, controlled by an exhaustvalve p. The two combustion-chambers m are arranged at the opposite ends of the cylinder-casting and are in free and open communication with the respective cylinders a. Each of the said combustion-chambers m is made of comparatively large size, as shown, ..al n a lmitet.itsb i s lined a ljjlllllfit is a bad condiictor of heat fi siich, for example, asa inixtu'reof plaster-of-paris and asbestos fiber wetted withwater, preferablyTotwateijaiid applied in a moist state, so as to form a lining q-say of from about a quarter to one-half an inch in thickness. The inner end of the piston 1- is also coated with a layer s of similar non-conducting material, held in place it may be, by a coverplate By this means combined with the slow movement or dwell of the piston r at the end of each inward stroke, hereinbefore referred to, complete combustion of the explosive charges can be effected and a high temperature attained. During the working of the motor the inner surface of the lining q will usually be maintained at a dull-red heat.

Each cylinder is fitted with a piston r, connected by a link n to a crank-arm w, fixed to one end of a rock-shaft 00, mounted in a bearing 3 at the open end of the cylinder a, so that the crank-arm 10 can work in and out of the cylinder. To the other end of the rockshaft is fixed a second crank-arm 1, Fig. 1, hereinafter called for distinction the outer crank-arm. One of the outer crank-arms 1 has its outer end bent at an angle, as shown at 2 in Figs. 1 and 5, to the remaining portion and connected by a comparatively long link 3 to the outer end of the other outer crank-arm 1. The bent end 2 of the firstmentioned outer crank-arm 1 is also jointed to one end of a second comparatively long link 4, the other end of which is jointed by a common pin 5 to the adjacent ends of two short links 6 and 7, that are arranged one on each side of the long link 4, to which they are jointed. One of these short links-via, 6is journaled upon a pivot-pin 8, fixed to the cylinder-casting at 8, Fig. 1, near to the outer end of .one of the cylinders a. The other short link-viz., 7-is journaled upon a crank-pin 9, fixed to a crank-arm 10, made in one piece with or secured to a shaft 11, which extends centrally through the cylindercasting and the tubular extension 1) thereof and through the support d, in which the said tubular extension is mounted to rotate. Between one end of the crank-shaft 11 and the adjacent cylinder-casting is a conical bearing 12, and between the other end of the crankshaft and the tubular extension is a ball-bearing 13. To this end of the shaft is fixed one ICO part of a clutch device, the other part of which is attached to the support (1 for the motor. The clutch may conveniently consist, as in the example shown, of a flanged disk 15, fixed to the crank-shaft l1 and fitted internally with a split friction spring-ring 16, that is fixed to a relatively stationary part of the vehicle and has between its ends a device, such as a wedge 17, Fig. 6, connected to a lever-arm 17, that is journaled on a pin 17", fixed to the support d, and is provided with an arm 17 under the control of a suitable automatic governor or hand-controlled mechanism, the arrangement being such that the friction-ring 16 can be expanded to hold the crank-shaft 11 stationary or can be allowed to contract to release the said disk 15 and shaft 11 and allow them to freely rotate with the cylinder-casting and attached parts, according as the lever-arm 17 is turned in one or other direction. As will be seen, the arrangement is such that when the motor is in action and the central crank-shaft 11 is fixed an explosive charge will be drawn into each cylinder 0, in turn through the inlet-port h on the suction-outstroke of its piston 0*, the said charge being compressed on the next instroke of the piston, then fired, so as to produce the next or working outstroke, after which the products of combustion are ex hausted through the outlet-port 0 on the next instroke, the suction-stroke taking place in one cylinder a while the working outstroke is being made in theother cylinder. When a governor is used for automatically putting the motor in and out of action, according as the speed of the vehicle or other body to be driven rises above or falls below a predetermined speed, such governor may advantageously be of the hit-and-miss type.

With the construction and arrangement of crank-arms l and links 3 4 6 7 hereinbefore described when the central crank-shaft 11 is fixed and the motor is in action the combustion of the charges in each combustion-chamber in turn will cause relative movement between each cylinder at and its piston r, with the result that the cylinders a and their carrier b and attached parts will rotate around the central crank-shaft 11, each piston r being caused to move very slowly at the inner and outer ends of its strokes, so as to practically dwell for a short time at each end, the dwell at the end of each instroke being of shorter duration than that at the end of each outstroke, and each outstroke of each piston being made in a very rapid manner and more quickly than each instroke, as and for the purposes hereinbefore explained. Upon releasing the central crank-shaft 11 such shaft, with the cylinders a and attached parts, will rotate as one piece under the momentum of the rotating parts, the relative movement between the cylinders and their pistons and the consequent drawing in, compression, firing, and expansion of the explosive charges and the expulsion of the spent gases ceasing.

The inlet and exhaust valves 01/ and 12, respectively, at the end of each combustionohamber m are each arranged to be opened inwardly against the action of a spring 1 8 by atwo-armed lever 19, fixed upon a spindle 1 20, mounted in a bearing 21 on the end of the combustion-chamber and provided with a lever-arm 22 and with a coiled spring 23, that tends to move the saidtwoarm lever 19 in a direction to cause it to open the inletvalve n against the action of its spring 18 and to allow the exhaust-valvep to automatically close under the action of'its spring 18. The said two-arm lever 19 is moved in the opposite direction against the action of its spring 23 to allow the inlet-valve n to close and to open the exhaust-valve p by onearm 24 of another two-arm lever that is pivoted to the cylinder-casting at 25, and the other arm 26 of which carries an antit'riction-roller 27, that is acted upon by a cam-plate 28, fixed to a toothed wheel 29, that is journaled upon a pin 30, fixed t9 the cylinder-casting, and gears with and normally travels around a central tooth wheel 31, fixed to the central crankshaft ll, The cam-plate 28 is formed with three operative cam-paths of different radii and each concentric to the center of motion of the plate, the cam-path viz., 32having the largest radius serving to open the exhaust-valve, thatviz., 33--having the smallest radius to allow of the' inleting the intermediate radius to hold the valveoperating levers 22, 24, and 26 in positiousin which both valves 91 and p are allowed to remain in the closed position. The epicyclic gearing formed by the central toothed wheel 31 and the two toothed Wheels 29 revolving around it is arranged to open and close the inlet and outlet valves 01 and p of each cylinder at the required times once in every two revolutions of the motor. For this purpose the central toothed wheel 31 may be one-half the diameter of each of the other two toothed wheels 29, so that each of the latter will be caused to rotate once about its center for each two revolutions about the center of the crank-shaft 11.

The combustible charges are exploded by an electric igniting device, the circuit of which is completed at the required times through two contacts 36 and 37, carried at the inner side of a plate 38, attached to the wall of each combustion-chamber m, one of such contacts-viz., 36-being fixed to but insulated from the said plate 38 and the other viz., 37being movable and carried bya spindle 37*, mounted to, rock in the said plate. Each of the insulated contacts 36 is connected by a conductor 36 to an axially-arranged pin 36", that is carried by but insulated from the.

rotary part of the motor and bears against an insulated spring-contact 36, that is in connection with one pole of an electric battery, the other pole of which is connected through the cylinder-casting to each of the movable contacts 37. The movable contact 37 is normally pressed away from the fixed one 36 by a spring 36*, and its spindle 37 is provided with an external tappet-arm 37, whereby it can be caused to bear upon the fixed contact 36 against the action of the spring until the tappet-arm is released, whereupon the movable contact Will suddenly spring away from the fixed one and form an electric spark that fires the explosive charge in the corresponding com bustiou-chamber. The tappet 37 is operated at the required times by a springarm 39, carried by a lever-arm 40, that is.

mounted to turn about the same center as the cam-operated lever 24 26 and to be operated by a cam or an eccentric 41, arranged to turn with and about the same center as the corresponding tooth-wheel 29 and cam-plate 28.

To the cylinder-casting is or may be fixed an annular hollow chamber 42 to serve as a silencing chamber or device through which the products of combustion from each cylinder will exhaust in turn, the said products flowing through a passage 43 in the cylindercasting. To the said chamber may be fixed a dust-proof casing 44 for inclosing the motorcylinders a and attached rotary parts. This casing 44 or the chamber 42, carrying it, may in some cases be adapted to rotate the shaft or other body to be driven. In the example the casing 44 is shown provided with a drivvalve being opened, and that-viz., 34-havl lug-ring 45, which may be a friction-ringer a toothed ring, or motion may be taken from any other suitable moving part of the revolving motor.

In some cases the motor may be supported at both ends in oppositely-arranged bearings and motion be taken from one end thereof. Figs. 7 and 8 show a motor of the kind described thus supported. In this case one end of the tubular portion 1) of the cylinder-casting is mounted to turn on the spindle 11, one end of which is supported in a ball-bearing 47, carried by one end of a fixed carrier 48. To the opposite end of the motor is suitably fixed a triangular frame 49, to which is fixed a hollow central spindle 50, that is mounted to rotate in a ball-bearing 51, carried by the opposite end of the carrier 48. Through the spindle 50 extends the insulated pin 36', connected to the electric conductors 36, and upon the spindle may be fixed a sprocket or other Wheel 52, through which motion is transmitted from the motor to the vehicle or other body to be driven. The carrier 48 may, as shown, be made as a receptacle provided with a hinged cover 53, having an opening 54 in each end thereof.

It will be evident that various changes can be made in the details of construction without departing from the spirit and scope of the invention, so long as the relative arrangement of parts shown in the drawings or the mode of operation described in the specification is preserved.

What I claim is- 1. A hydrocarbon-motor comprising a rotary carrier, a support therefor, motor-cylinders fixed tangentially to the axis of said carrier and each provided with a piston, a normally stationary crank shaft or body provided with a crank-pin and around which said carrier and cylinders are mounted to rotate, a rock-shaft mounted at the outer end of each cylinder and provided with an inner crankarm connected to the piston of the corresponding cylinder and with an outer crankarm, and link mechanism connecting the outer crank-arms to said crank-pin, substantially as described for the purposes set forth.

2. A hydrocarbon-motor comprising a 1'0- tary carrier, a support therefor, motor-cylinders fixed tangentially to the axis of said carrier and each provided with a piston, a crank shaft or body provided with a crankpin and around which said carrier and cylinders are mounted to rotate, means whereby said crank shaft or body can be held stationary and released, a rock-shaft mounted at the outer end of each cylinder and provided with an inner crank-arm connected to the piston of the corresponding cylinder and with an outer crank-arm, and link mechanism connecting the outer crank-arms to said crankpin and to a rotary part of said motor, substantially as described for the purposes set forth.

3. A hydrocarbon-motor comprising a rotary carrier, a support therefor, motor-cylinders fixed tangentially to the axis of said carrier and each provided with a piston, a normally stationary crank shaft or body provided with a crank-pin and around which said carrier and cylinders are mounted to rotate, a rock-shaft mounted at the outer end of each cylinder and provided with an inner crankarm connected to the piston of the corresponding cylinder, and with an outer crank-arm, a link connecting the outer crank arms together, a second link jointed at one end to one of said outer crank-arms, a pair of additional links jointed to the other end of said second link and one of which is jointed to said crank-pin andthe other to a rotary part of the motor, means for admitting explosive charges to said cylinders alternately, means for firing said charges, and means for causing the exhaust of the spent gases.

4. A hydrocarbon-motor comprising a rotary carrier, a support therefor, motor-cylinders fixed tangentially to the axis of said carrier and each provided with a piston, a normally stationary crank shaft or body provided with a crank-pin and around which said carrier and cylinders are mounted to rotate, a rock-shaft mounted at the outer end of each cylinder and provided with an inner crankarm connected to the piston of the corresponding cylinder and with an outer crank-arm, one of said outer crank-arms having its outer end bent at an angle to the remaining portion, a link connecting the bent end of said crank-arm to the other outer crank-arm, a second link jointed at one end to the said bent end of one of the outer links, a pair of shorter links jointed to the other end of said second lin k at opposite sides thereof, one of said links being also jointed to said crank-pin and the other to a rotary part of said motor, means for admitting explosive charges to said cylinders alternately, means for firing said charges, and means for causing the exhaust of the spent gases.

5. A hydrocarbon-motor comprising two cylinders arranged with their axes parallel to one another and a central tubular extension projecting laterally from one side thereof, a crank-shaft extending through said tubular extension and provided at one end with a crank and crank-pin and at the other end with a clutch device whereby it can be held stationary or released, a support for said tubular extension and crank-shaft, two rock-shafts carried by said casting near the outer open ends of said cylinders and each provided with two crank-arms one of which is arranged to enter the open end of the corresponding cylinder and is connected bya link to the piston there in, and the other is located outside said cylinder, and link mechanism substantially as described connecting the outer crank-arms of the rock-shafts to the crank-pin and to the combined cylinders and carrier, substantially as described.

6. Inahydrocarbon-motor,the combination with a rotary carrier and two parallel motorcylinders fixed thereto and each fitted with a piston, of a central crank-shaft about which the carrier and cylinders are mounted to turn, a crank arm and pin fixed to one end of said shaft, a clutch device at the other end of said shaft whereby the same can be held stationary or released,tworock-shaftsx each mounted in a bearing near the outer end of one of said cylinders and provided with inner and outer crank-arms u and 1 respectively, one of the outer crank-arms having a bent end 2, a link connecting the inner arm of each rock-shaft to the piston of the corresponding cylinder, a link 3 connecting the bent end 2 of one of the outer crank-arms to the other outer crankarm, a link 4 jointed at one end to the said bent ends 2 of one of the outer crank-arms, and a pair of short links 6 and 7 jointed by a common pin 5 to the other end of said link 4, said link 6 being jointed by a pin to the cylinders, and said link 7 being jointed to said crank-pin 9, substantially as described for the purposes specified.

7. Inahydrocarbon-motor,motor-cylinders mounted to rotate and each having a normally closed combustion-chamber with separate inlet and exhaust valves and valve-chambers at one end, a tubular extension connected to said cylinders and formed with agas-passage leading to the inlet-valve chamber of each cylinder, and a stationary body surrounding said tubular extension and formed with a gas passage and port in communication with the gaspassage in said tubular extension.

8. In ahydrocarbon-motor,the combination ofa rotary casting comprising motor'cylinders each provided at one end with a normally closed combustion-chamber and a gas-inlet valve and valve-chamber, and a tubular extension formed with gas-passages communieating at one end with the inlet-valve chambers of the respective cylinders and at the other end with ports in the periphery of said extension, and a stationary body surrounding said tubular extension and formed with a gas-passage therethrough terminating in a port in communication with the gas-passages in said tubular extension.

9. In a hydrocarbon-motor, a casting comprising a pair of cylinders a and a tubular extension extending from one side thereof and formed with gas-passages 6 leading to the inlet valve chamber at the closed end of each cylinder and terminating in ports f in the periphery of said extension, and a stationary gas-supply chamber 9 surrounding said tubular extension and in communication with the tween said bearings, and said support being made hollow to serve as a gas-supply device an d provided with a port also located between said bearings, snbstantialy as described.

11. In a hydrocarbon-motor, the combination of the two rotary cylinders a and lateral extension I) made integral with one another and formed with the gas-supply passages c c and portsf, the normally stationary shaft 11 extending through said tubular extension, and the hollow support g formed with the gas-outlet portf and provided with hearings c c for said extension, substantially as described.

12. In a hydrocarbon-motor, the combination of motor-cylinders each provided at one end with a combustion-chamber and separate inlet and exhaust valves and valve-chambers, a rotary tubular carrier connected to said cylinders and formed with gas -supply passages leading to the respective inlet-valve chambers, a support for said carrier, an annular silencing-chamber connected to said cylinders, and surrounding said tubular carrier, and exhaust-passages connecting the exhaustwalve chambers to said silencing-chainber, substantially as described.

13. In a hydrocarbon-motorot'the kind herein referred to, the combination with a rotary carrier, motor-cylinders connected thereto, and inlet and exhaust valves for controlling the supply of explosive charges to and the exhaust of spent gases from the motor-cylinders, of valve-operating mechanism for each cylinder, a cam for actuating each set of said valve-operating mechanism, and epicyclic gearing foractnating the cams, said gearing comprising a normally stationary centrally arranged toothed wheel, and other toothed wheels journaled to the rotary part of the motor, gearing with said central toothed wheel and connected to said cams.

14. In a hydrocarbon-motorof the kind herein referred to, the combination with a rotary carrier, motor-cylinders connected thereto, and inlet and exhaust valves for controlling the supply of explosive charges to and the exhaust of spent gases from the motor-cylinders, of valve-operating mechanism for each cylinder, a cam for actuating each set of said valve -operating mechanism, and epicyclic gearing for actuating the cams, said gearing comprising a centrally arranged toothed wheel, means whereby the samecanbe held stationary or allowed to rotate with said motor, and other toothed wheels journaled to the rotary part of the motor, gearing with said central toothed wheel and connected to said earns.

15. In a hydrocarbon-motor, the combination with a rotary carrier, motor-cylinders fixed thereto and each provided at one end with separate gas inlet and exhaust valves provided with springs that tend to close them,

a pair of inlet and exhaust valves, a second lever adapted to operate and control the position of each of the first-mentioned levers, a cam for operating each of said second levers, and epicyolic gearing carried by said motor and worked by the rotation thereof for rotating said cams.

16. In a hydrocarbon-motor, the combination with a rotary carrier, motor-cylinders connected thereto and each provided at one end with a closed combustion-chamber having a pair of inlet and exhaust valves provided with springs that tend to close them, of valve-operating mechanism for each pair of valves, said mechanism comprising a twoarm lever mounted in a hearing at the outer side of the valvechambers and provided with a lever-arm, a springtending to cause said lever to open the inlet-valve and allow the exhaust-valve to close, a second lever pivoted to the rotary motor and adapted to act upon and move said lever-arm in a direction to cause said two-arm lever to open the exhaust-Valve and allow the inlet-valve to close, a cam for operating said second lever, a toothed wheel journaled to said motor and connected to said cam, and a centrally-arranged normally stationary toothed wheel gearing with the first mentioned toothed wheel and around which the latter wheel normally travels, substantially as described.

17. In a hydrocarbon-motor, the combination with a rotary carrier, motor-cylinders connected thereto and each provided with separate inlet and exhaust valves provided with springs tending to close them, a twoarmed lever pivoted to the outer side of the valve-chambers of each cylinder, a lever-arm connected to each of said two-arm levers, and a spring tending to move said lever in a direction to open the corresponding inlet-valve and allow the exhaust-valve to close, of a centrally-arranged shaft or body, a toothed wheel fixed thereon, means for holding and releasing said shaft or body, and sets of valve-controlling mechanism for each pair of inlet and outlet valves, each set of valve mechanism comprisinga two-armed lever pivoted to a rotary part of the motor and having one arm adapted to move the first-mentioned lever and lever-arm in opposition to their spring, a rotary cam having three cam-paths of different radii arranged to act successively upon the other arm of the second two-arm lever, and a toothed wheel carrying said cam, journaled to a rotary part of said motor, and gearing with the centrally arranged toothed wheel, substantially as described.

18. A hydrocarbon-motor comprising a r0- tary carrier, two cylinders fixed thereto and each provided at one end with separate inlet and exhaust valves, a crank-shaft extending through said carrier and provided at one end with a crank-pin and at the other end with a clutch device whereby it can be held stationary or released, mechanism substantially as described connecting the piston of each cylinder to said crank-pin and to a rotary part of the motor, a central toothed wheel fixed to and concentric with said shaft, two outer toothed wheels journaled to a rotary part of said motor, gearing with said central toothed wheel and of half the diameter thereof, a cam fixed to each of said outer toothed wheels and formed with three cam-surfaces of different radii, and spring-actuated lever mechanism substantiallyas described for controlling each pair of valves, said lever mechanism being pivoted to a rotary part of said motor and arranged to be operated in one direction by one of said cams and in the opposite direction by its spring, as set forth.

19. In a hydrocarbon-motor, the combination with a crank-shaft, and crank, and the piston of said motor, of two links that are jointed together at oneend and one of which is jointed at its other end to the crank-pin and the other is jointed to a relatively fixed part of the motor at a point outside the circular path of the crank-pin, and means connecting the jointed ends of said links to said piston.

Signed at 77 Oornhill, London, E. 0., this 9th day of August, 1901.

WILLIAM JOSEPH STILL.

Witnesses:

PERCY E. MATTooKs, WM. 0. BROWN. 

